<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model="name" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="gender">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="add">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="item in list" :key="item.id">
          <td>{{ item.id }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.gender }}</td>
          <td>
            <button @click.prevent="del(item.id)">删除</button>
            <button>编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      list: [
        {
          id: '',
          name: '',
          gender: '',
          age: '',
        },
      ],
      id: '',
      name: '',
      gender: '',
      age: '',
    }
  },
  methods: {
    add() {
      if (this.age < 0) {
        alert('输入不合法')
        return
      }
      this.list.splice(0)
      this.list.push({
        id: this.list.length + 1,
        name: this.name,
        age: this.age,
        gender: this.gender,
      })
      this.id = ''
      this.name = ''
      this.age = ''
      this.gender = ''
    },
    del(id) {
      this.list = this.list.filter((item) => item.id !== id)
    },
  },
}
</script>
